Machine for drawing metal tubes



(No Mddel.)

L. F. SMITH.-

MAGHINE FOR DRAWING METAL TUBES.

Patented Mar. '22, 1887.

p INVENTO:

ATTORNEY.

ijlTED STATES PATENT rarest LEVI F. SMITH, OF PHILADELPHIA,PENNSYLVANIA.

MACHINE FOR DRAWING METAL TUBES.

SPECIFICATION forming part of Letters Patent No. 359,898, dated March22, 1857. Application filed April 15,1886. Serial No.198,5)02. (Nomodel.)

To all 2071,0122. it may concern:

Be it known that I, LEYIF. SMITH, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Machines for Drawing MetalTubes, Shells, dtc, which. improvement is fully set forth in thefollowing specification and accompanying drawings, in which- Figure 1represents aside elevation of a machine for drawing metal tubes, shells,&-c.,embodying my invention. Fig. 2 represents a horizontal sectionthereof. Fig. 8 represents a longitudinal section of a detached portionthereof on an enlarged scale. Fig. 4 represents a longitudinal sectionof a portion of a modification.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention relates to improvements in machines for drawing tubes,shells, 820., in which such articles may be forced throughreducing-dies; and it consists in the details of construction andarrangement of parts,as hereinafter set forth, whereby, while themachine is simple in the number of its parts and easily managed, theoperation is accurate and the work efficiently performed.

Referring to the drawings, A represents a cylinder containing apistonhead, B, and a piston-rod, C.

E represents a pump, engine, or other device, whercby water or otherfluid may be directed into the cylinder A, and power exerted on thepistonhead B for forcibly advancing the same, said piston-head havingfirmly attached a piston-rod, G, which passes through a tightly-fittingstuffing-b0X,D,at the forward end of the cylinder A.

F F represent guiding-rods, which extend parallel with the piston-rod G,and are supported at the forward end on the standards G G, and at theback end are firmly attached to the cylinder A, said rods F F havingslotted apertures for stops a for the fixed or adjustable cross-head H,with an aperture through the same of a convenient shape for holding thereducing-die J.

Supported on the rods F is a cradle or movable frame consisting ofcross-heads K K, which have apertures near each end,which permit thesaid heads to move easily on the rods F; also, the crosshead H has twoapertures, through which pass the rods L, that connect the cross-heads KK of the cradle together, forming a strong structure for supporting amandrel, M, one end of which is secured to the cross-head K, while theopposite end passes freely through thecross-head K, and is adapted to beengaged by the piston G,it being noticed that the mandrel M is passedthrough the shell N and has a shoulder or contrac tion, P, which abutsagainst a shoulder or con traction, P, on the bore of the shell N at oneend thereof,said end having also on its exterior a groove, Q, wherebythe shell N may be grasped or grappled by tongs (shown in dotted lines,Fig. 3) or other device, the same being suitably connected with themandrel or the crosshead K for drawing the shell, &c. ,through the diewhen so required; (See dotted lines,Fi g. 3.)

It will be seen that when the parts are in proper position and power isapplied to the piston-head B the cradle is advanccd,whereby the shoulderor enlargement on the mandrel and shoulder or contraction in the bore ofthe shell N is pushed or pulled through the reducing-dic J, thus causingthe drawing or reduction of the same. The power then may be reversed,which will force the rod C and cradle back to their normal or startingposition,read y to force the same or another shell,&c.,through thereducing-die, and so on indefinitely, as many and as long as may bedesired.

If desired, the rod (3 may be made to abut against the cross-head K ofthe frame, whereby the cradle is advanced and the crosshead K pulls theshell, &c., through the die. The ac tion of pulling the shell, dc,through the die may also be accomplished by the use of the tongs, grip,or other device, which may be attached to the cross-head K and grasp theshell, 820., said tongs or other grasping device being moved by theforward motion of the cradle. Again, if desired, the shell, &C., may beboth pushed and pulled through the die, or the rod 0 may engage with theshouldered mandrel M and force the tube, shell, 800., through thereducing-die J and head H; but in either case the drawing or reducing ofthe shells, &e., is accomplished in an expeditious and reliable manner.

- InFig. 4 the rod 0 and mandrel M are shownconnected for the purpose ofdrawing back the mandrel M or cradle, or botlnthe pump or engine havingreversing mechanism for returning the piston. The said reversingmechanism may be of any suitable and wellknown construction, and as thesame is not:

claimed specifically herein it is not shown in the drawings.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a machine for drawing metal tubing, shells, 820., the rod 0 andmeans, substantially as described, for imparting motion thereto, amovable frame, the mandrel M, carried by said frame and operated by saidrod 0, the guide-rods F F, and the cross-head H, with a reducing-die,said parts being combined and:

operating substantially as stated.

2. In a machine for drawing metal tubing,

shells, &c., the rod 0 and means, substantially as described, forimparting reciprocating motion thereto, a sliding frame formed of thecross-heads K K, connected by the rods L L, the mandrel M, carried bysaid frame and 0 erated by said rod C,guide-rods for said frame, i

and the head H,having reducing-die J, the several parts being combinedand operating substantially as set forth.

3. In a machine for drawing metal tubing,a rod, 0, and means,substantially as described,

for im artin reci rocatin motion thereto D p b 9 movable frameconsist-ingot crossheads K K,

with connecting-rods LL, the guide-rods F F, the adjustable headH,-having reducing-die J and mandrel M,said parts being combined andoperated substantially as and for the purpose set forth.

4. In a machine for drawing metal tubing, shells, &c., a rod and means,substantially as described,for imparting reciprocating motion thereto,guiding-rods having adjustable stops, a movableframe mounted on saidguiding-rods, and carrying a reducing-die and a mandrel,

all of said parts being combinedand operating J substantially as and forthe purpose set forth. 5. In a machine for drawing metal tubing,

shells, 850., the rod 0 and means, substantially as described, forreciprocating the same, the

guiding-rods FF, having adjustable stops a, v a movable frame formed ofthe erossheads K, connected by the rods L L, and carrying mandrel M,having shoulder I, said frame be: ing mounted on saidguiderods, and thehead H, mounted on said guide-rods betweensaid crossheads K K, andcarrying reducingdie J, all of said parts being combined and operatingsubstantially as and for the purpose. set forth.

LEVI F. SMITH. \Vitnesses:

JOHN A. Wrnnnasunnr, A. P. GRANT.

